.navi {
    float: left;
    margin-top : 2px;
    margin-bottom : 2px;
    margin-left : 3px;
    margin-right: 3px;
}
#navi_bar {
    height: 40px;
    width: 600px;
}
#data_show {
    width: 800px;
}
#hight_light_nav_opt {
    background-color:gold;
}
#sidebar {
    float: left;
    width: 180px;
    margin-right: 20px;
}
.sidebar_item {
    font-size: 18px;
    font-weight: bold;
    cursor: pointer;
    text-align: center;
}